add vagrant docker provider

Signed-off-by: rootfs <hchen@redhat.com>
add vagrant docker provider

Signed-off-by: rootfs <hchen@redhat.com>
review feedback

Signed-off-by: rootfs <hchen@redhat.com>
validate if vagrant provider is as expected

Signed-off-by: rootfs <hchen@redhat.com>
create ssh key for vagrant ssh to consume

Signed-off-by: rootfs <hchen@redhat.com>
add test case to make sure the block file is unlocked after generating ResponseMessage in DataServer
FIX TACHYON-232: Add warning messages to guard against illegal input to seek() functions in HdfsFileInputStream.java
Tachyon-232: Add warning messages to guard against illegal input to seek() functions in HdfsFileInputStream.java
Merge pull request #530 from shimingfei/DataServerLockFix

unlock block after generate respose message in NIODataServer
Merge pull request #528 from rootfs/vagrant-docker

add vagrant docker provider
Merge pull request #535 from shaoshal/master

FIX TACHYON-232: Add warning messages to guard against illegal input to ...
fix bug in TachyonFSTest
Merge pull request #537 from uronce-cc/bugInTachyonFSTest

fix bug in TachyonFSTest